A spliced ​​bridge and a bridge splicing method

Abstract

The present application relates to a splicing type bridge and a bridge splicing method. The splicing type bridge comprises a tower crane seat, a suspension mechanism arranged on the tower crane seat, and a hanger arranged at the bottom end of the suspension mechanism. The suspension mechanism comprises a drum fixed on the tower crane seat; the drum comprises a drum frame and a rotating shaft rotatably connected to the drum frame; a cylinder body is rotatably arranged around the rotating shaft; an insert is arranged in the cylinder body along its own radial sliding; an electromagnet is fixedly arranged in the cylinder body, and a magnetic suction piece is fixed on the side of the insert away from the rotating shaft; a weight is fixedly connected to the bottom of the hanger, and a photoresistor is fixed on the side of the weight close to the bridge body. The bridge splicing method of the splicing type bridge comprises the following steps: setting up a tower crane seat at the cross section of the bridge body, and setting a suspension mechanism on the seat; the suspension mechanism suspends the weight and moves it to a position flush with the top of the cross section of the bridge body, and then stops moving, and the bridge body is spliced ​​and constructed. The present application has the effect of stopping when it contacts the cross section of the bridge body during the bridge hoisting process.

Description

Technical Field

[0001] The present application relates to the field of spliced ​​bridges, and in particular to a spliced ​​bridge and a bridge splicing method. Background Art

[0002] Bridges can be divided into spliced ​​and one-piece types according to different construction methods. One-piece bridges are generally smaller in size and difficult to use in large bridge projects. At present, a large number of bridges are constructed using the spliced ​​construction method.

[0003] For related technologies, reference may be made to the Chinese invention patent application with application number CN108249334A, which discloses a spliced ​​bridge and a bridge splicing method, including a base plate, a winding drum is provided on the top of the base plate, a strip convex plate is provided on the inner wall of the winding drum, a first rotating drum and a second rotating drum are provided inside the winding drum, a strip slide groove is provided outside the first rotating drum and the second rotating drum, a baffle is provided at the end of each of the first rotating drum and the second rotating drum, a first rotating shaft is provided inside the first rotating drum, and a boss is provided at one end of the first rotating shaft. The present invention drives the first rotating drum and the second rotating drum to move left and right by a first screw rod, and the strip convex plate is movably connected with the strip slide groove, which is conducive to the convenient installation and disassembly of the winding drum and can be driven by the first rotating drum and the second rotating drum to rotate and wind the wire. Rollers are provided at the bottom of the first screw rod, the second screw rod and the baffle plate, which improves the stability of the disassembly and installation of the winding drum and the stability of the wire groove driving the rope to be evenly wound.

[0004] The inventor believes that the above-mentioned related technologies have the following defects: During the bridge splicing process, the bridge body needs to be hoisted onto the bridge seat in advance. When the bridge body is hoisted to the predetermined position, it is inconvenient for the operator to observe the position of the bridge body in the tower crane, which may lead to excessive or insufficient wire laying, which requires constant adjustment, affecting the efficiency of bridge hoisting and splicing. Summary of the invention

[0005] In order to improve the problem that the bridge body cannot stop descending at a predetermined position during the bridge hoisting process, the present application provides a spliced ​​bridge and a bridge splicing method.

[0006] The present application provides a spliced ​​bridge, which adopts the following technical solution:

[0007] A spliced ​​bridge comprises a tower crane seat, a suspension mechanism arranged on the tower crane seat and a suspension rod arranged at the bottom end of the suspension mechanism, the suspension mechanism comprises a drum fixed on the tower crane seat; the drum comprises a drum frame and a rotating shaft rotatably connected to the drum frame; a cylinder body is rotatably arranged on the circumference of the rotating shaft; a plug-in piece which can be plugged into the circumference of the rotating shaft is arranged in the cylinder body along its own radial sliding; an electromagnet is fixedly arranged in the cylinder body, and a magnetic attraction piece which can be magnetically attracted to the electromagnet is fixed on the side of the plug-in piece away from the rotating shaft; a weight is fixedly connected to the bottom of the suspension rod, and a photoresistor is fixed on the side of the weight close to the bridge body; a power supply component which can supply power to the electromagnet is arranged between the photoresistor and the electromagnet.

[0008] By adopting the above technical solution, when the plug-in and the rotating shaft are in the plug-in state, the cylinder rotates with the rotating shaft, and the cylinder is in the line-release state at this time, and the heavy object is suspended and put down by the cylinder. When the heavy object and the cross section of the bridge body are at the same level, the photoresistor located on the side of the heavy object is blocked by the cross section of the bridge body, and the photoresistor cuts off the power supply of the electromagnet 1 through the power supply component, so that the electromagnet 1 loses its adsorption effect on the magnetic suction piece 1, and the purpose of separating the plug-in and the rotating shaft is achieved, so that the cylinder stops releasing the line downward, and the heavy object stops moving after it is at the same level as the cross section of the bridge body.

[0009] Optionally, the power supply assembly includes a support plate fixed to the top surface of the heavy object and an electromagnet 2 fixed to the top surface of the support plate, the electromagnet 2, the photoresistor and the power supply are connected in series to form a series circuit; the top surface of the support plate is slidably connected with a switch movable plate and a switch fixed plate along the width direction of the suspension rod; the relative outer sides of the switch movable plate and the switch fixed plate are respectively fixed with a magnetic attraction plate 2 that can be magnetically attracted to the electromagnet 2; the switch movable plate is electrically connected to the electromagnet 1, and the switch fixed plate is electrically connected to the power supply.

[0010] By adopting the above technical solution, when the photoresistor is shielded by the cross section of the bridge body, the resistance of the photoresistor itself increases, thereby reducing the current in the series circuit of the photoresistor and the second electromagnet, reducing the magnetism of the second electromagnet, and causing the switch movable plate and the switch fixed plate magnetically attracted to the second electromagnet to lose the magnetic attraction of the second electromagnet and attract each other, thereby causing the switch movable plate and the switch fixed plate to approach each other and finally make electrical contact. After the switch movable plate and the switch fixed plate are closed, the first electromagnet conducts electricity.

[0011] Optionally, a second guide piece is fixed to the side walls of the switch movable piece and the switch fixed piece, a second guide groove is provided on the top surface of the support plate, and the second guide piece is slidably connected to the support plate through the second guide groove.

[0012] By adopting the above technical solution, the second guide groove provides a guiding function for the second guide piece, thereby reducing the possibility of the switch moving piece and the switch fixed piece deviating from the track during movement.

[0013] Optionally, a spring 2 is fixed to a side of the guide piece 2 close to the electromagnet 2, and an end of the spring 2 away from the guide piece 2 is fixedly connected to an inner wall of the guide groove 2.

[0014] By adopting the above technical solution, both the switch movable plate and the switch fixed plate are subjected to the elastic force exerted by the second spring. When the magnetic attraction of the second electromagnet decreases, the second spring pushes the switch movable plate and the switch fixed plate closer to each other.

[0015] Optionally, a winding rope is wound around the outer circumference of the cylinder; the bottom end of the winding rope is fixedly connected to the suspension rod; a motor is fixed to the outer side of the rotating plate, and the motor output shaft is coaxially fixedly connected to the end of the rotating shaft; a rotating hole arranged along the axial direction of the cylinder is opened at the axial center position, and the rotating shaft is rotatably connected to the reel through the rotating hole; a sliding groove is opened on the peripheral side of the rotating hole, and the cylinder is slidingly connected to the plug along its own radial direction through the sliding groove; the electromagnet is fixed to the inner wall of the sliding groove away from the rotating hole.

[0016] By adopting the above technical solution, the rope is wound around the circumference of the cylinder, and the heavy object can be lifted or lowered by rotating the drum.

[0017] Optionally, a slide groove 2 is provided on the slide groove 1 near the side of the rotating plate, and the cylinder body is connected with a contact plate through the slide groove 2 for axial sliding movement along its own axis; inclined surfaces are provided on the relative inner sides of the contact plate and the insert plate; a connecting disk is fixed on the side of the contact plate near the rotating plate, and a cylinder plate that can engage with the connecting disk is fixed on the side wall of the cylinder frame.

[0018] By adopting the above technical solution, when the insert moves away from the rotating shaft, the insert can push the contact plate to move closer to the cylinder plate, so that the connecting plate and the cylinder plate are engaged. The engagement of the connecting plate and the cylinder plate can provide a limiting effect for the cylinder body, so that after the cylinder body is separated from the rotating shaft, it will not remain in a rotating state due to the gravity of the heavy object itself.

[0019] Optionally, a guide piece 1 is fixed to the side of the abutment piece away from the rotating shaft, a guide groove 1 is formed on the side of the slide groove 2 away from the rotating hole, and the guide piece 1 is slidably connected to the cylinder along the axial direction of the cylinder through the guide groove 1.

[0020] By adopting the above technical solution, the guide groove 1 provides a guiding function for the guide plate 1, thereby reducing the possibility of the abutment plate deviating from the track during the axial movement of the cylinder.

[0021] Optionally, a spring is fixed to the side of the guide plate 1 close to the rotating plate, and the end of the spring 1 away from the guide plate 1 is fixedly connected to the inner wall of the guide groove 1 away from the sliding groove 1.

[0022] By adopting the above technical solution, the spring provides an elastic force to the guide piece toward one side of the rotating shaft, so that the insert piece is separated from the rotating shaft after the electromagnet loses its magnetism.

[0023] Optionally, a plurality of engaging teeth are fixed to a side of the connecting plate away from the cylinder body; and a plurality of engaging grooves which can be plugged into the engaging teeth are formed on a side of the rotating plate close to the cylinder body.

[0024] By adopting the above technical solution, the engagement teeth and the engagement grooves can be engaged with each other, so that a limiting effect can be exerted on the cylinder, thereby preventing the cylinder from continuously rotating.

[0025] The present application provides a bridge splicing method for a spliced ​​bridge, which adopts the following technical solution:

[0026] A bridge splicing method for a spliced ​​bridge comprises the following steps:

[0027] A tower crane base is set up at the bridge section, and a suspension mechanism is installed on the base;

[0028] The suspension mechanism suspends the heavy object and moves it to a position flush with the top of the bridge section, then stops moving to proceed with bridge splicing and construction.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. When the plug and the shaft are in the plugged state, the cylinder rotates with the shaft, and the cylinder is in the line-release state at this time. The weight is suspended and lowered by the cylinder. When the weight and the bridge section are at the same level, the photoresistor located on the side of the weight is blocked by the bridge section. The photoresistor cuts off the power supply of electromagnet 1 through the power supply component, so that electromagnet 1 loses its adsorption effect on magnetic sheet 1, achieving the purpose of separating the plug and the shaft, so that the cylinder stops releasing the line downward, and the weight stops moving after it is at the same level as the bridge section;

[0031] 2. When the photoresistor is shielded by the cross section of the bridge body, the resistance of the photoresistor itself increases, thereby reducing the current in the series circuit of the photoresistor and the second electromagnet, and reducing the magnetism of the second electromagnet. The switch moving piece and the switch fixed piece magnetically attracted to the second electromagnet lose the magnetic attraction of the second electromagnet and attract each other, so that the switch moving piece and the switch fixed piece are close to each other and finally make electrical contact. After the switch moving piece and the switch fixed piece are closed, the first electromagnet conducts electricity;

[0032] 3. When the insert moves away from the rotating shaft, the insert can push the contact plate to move closer to the cylinder plate, so that the connecting plate and the cylinder plate are engaged. The engagement of the connecting plate and the cylinder plate can provide a limiting effect for the cylinder, so that after the cylinder is separated from the rotating shaft, it will not remain in a rotating state due to the gravity of the heavy object itself. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the tower crane base according to an embodiment of the present application.

[0034] Figure 2 It is a cross-sectional view of the suspension mechanism of the embodiment of the present application.

[0035] Figure 3 is along Figure 2 Section view along line AA.

[0036] Figure 4 It is a schematic diagram of the structure of the power supply component of the embodiment of the present application.

[0037] Figure 5 It is a schematic diagram of the structure of the power supply component of the embodiment of the present application.

[0038] 1. The support assembly includes the following: 1. the support frame; 2. the support structure; 3. the support frame; 4. the support frame; 5. the support frame; 6. the support frame; 7. the support frame; 8. the support frame; 9. the support frame; 10. the support frame; 11. the support frame; 12. the support frame; 13. the support frame; 14. the support frame; 15. the support frame; 16. the support frame; 17. the support frame; 18. the support frame; 19. the support frame; 20. the support frame; 21. the support frame; 22. the support frame; 23. the support frame; 24. the support frame; 25. the support frame; 26. the support frame; 27. the support frame; 28. the support frame; 29. ​​the support frame; 30. the support frame; 31. the support frame; 32. the support frame; 33. the support frame; 34. the support frame; 35. the support frame; 36. the support frame; 37. the support frame; 38. the support frame; 39. the support frame; 40. the support frame; 41. the support frame; 42. the support frame; 43. the support frame; 44. the support frame; 45. the support frame; 46. the support frame; 47. the support frame; 48. the support frame; 49. the support frame; 50. the support frame; 51. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-5 This application is described in further detail.

[0040] The present application discloses a spliced ​​bridge and a bridge splicing method. Figure 1 A spliced ​​bridge includes a tower crane base 1, a suspension mechanism 2 arranged on the tower crane base 1, and a suspension rod 3 arranged at the bottom end of the suspension mechanism 2.

[0041] Reference Figure 1 and Figure 2 Two sets of suspension mechanisms 2 are arranged on the tower crane seat 1, and the suspension mechanism 2 includes a drum 5 fixed to the top of the tower crane seat 1 and arranged downward. The drum 5 includes a drum frame 22, two rotating plates 63 fixed to the relatively inner sides of the drum frame 22, and a rotating shaft 24 rotatably installed on the relatively inner sides of the two rotating plates 63. A cylinder 23 is rotatably arranged around the rotating shaft 24. A winding rope 25 is wound around the outer circumference of the cylinder 23. A motor is fixed on the outer side of the rotating plate 63, and the motor output shaft is coaxially fixedly connected with the end of the rotating shaft 24.

[0042] Reference Figure 2The cylinder 23 has a rotating hole 21 arranged along its own axial direction at its axis center position, and the rotating shaft 24 is rotatably connected to the reel 5 through the rotating hole 21. Four groups of plug-in components 4 are arranged around the rotating hole 21 to make the cylinder 23 rotate along the rotating shaft 24. The plug-in components 4 include plug-in pieces 41 arranged along the radial direction of the rotating drum; and a slot 42 that can be plugged into the plug-in pieces 41 is arranged around the rotating shaft 24. A slide groove 43 is arranged around the rotating hole 21, and the cylinder 23 is slidably connected to the plug-in pieces 41 along its own radial direction through the slide groove 43.

[0043] The rotating shaft 24 is rotatably connected to the drum body 23, and the plug 41 is plugged into the slot 42 to realize the connection between the rotating shaft 24 and the drum. When the motor drives the rotating shaft 24 to rotate, the rotating shaft 24 drives the drum to rotate. When the plug 41 is separated from the rotating shaft 24, although the rotating shaft 24 still rotates under the drive of the motor, the drum can stop rotating.

[0044] Reference Figure 2 An electromagnet 44 is fixed to the side of the slide groove 43 away from the rotating hole 21 ; a magnetic attraction sheet 45 that can be magnetically attracted to the electromagnet 44 is fixed to the side of the insert sheet 41 away from the rotating shaft 24 .

[0045] After the electromagnet 44 is energized, the electromagnet 44 adsorbs the magnetic sheet 45, so that the insert sheet 41 can be separated from the rotating shaft 24, so that the rotating drum no longer rotates with the rotating shaft 24.

[0046] Reference Figure 2 The slide groove 1 43 is provided with a slide groove 2 51 on the side close to the rotating plate 63, and the cylinder 23 is connected to the contact piece 52 by sliding along its own axial direction through the slide groove 2 51; the contact piece 52 and the inserting piece 41 are provided with inclined surfaces 53 on the opposite inner sides. A guide piece 1 54 is fixed on the side of the contact piece 52 away from the rotating shaft 24, and a guide groove 1 55 is provided on the side of the slide groove 2 51 away from the rotating hole 21. The guide piece 1 54 is connected to the cylinder 23 by sliding along the axial direction of the cylinder 23 through the guide groove 1 55. A spring 1 56 is fixed on the side of the guide piece 1 54 close to the rotating plate 63, and the end of the spring 1 56 away from the guide piece 1 54 is fixedly connected to the inner wall of the guide groove 1 55 away from the slide groove 1 43.

[0047] The guide groove 1 55 provides a guide for the guide piece 1 54, and the spring 1 56 provides an elastic force for the guide piece 1 54 to return to the side away from the rotating plate 63. The contact piece 52 moves to the side away from the rotating plate 63 under the elastic force applied by the spring 1 56, and the contact piece 52 presses the inserting piece 41 and pushes the inserting piece 41 to be plugged with the rotating shaft 24.

[0048] Reference Figure 2 and Figure 3A connection plate 6 is fixed to the side of the abutment sheet 52 close to the rotating plate 63. The connection plate 6 is arranged between the cylinder 23 and the rotating plate 63, and the connection plate 6 is sleeved on the circumference of the rotating shaft 24. The connection plate 6 has a plurality of meshing teeth 61 evenly distributed along its circumference on the side away from the cylinder 23; and the rotating plate 63 has a plurality of meshing grooves 62 evenly distributed along its circumference on the side close to the cylinder 23, which can be plugged with the meshing teeth 61.

[0049] The inserting piece 41 is attracted by the electromagnet and moves away from the rotating shaft 24. The inserting piece 41 abuts against the abutting piece 52 and pushes the connecting plate 6 to move away from the cylinder 23. After the cylinder 23 is separated from the rotating shaft 24, the cylinder 23 continues to rotate due to the gravity of the bottom end of the winding rope 25; when the connecting plate 6 is engaged with the rotating plate 63, the cylinder 23 is limited and stops rotating.

[0050] Reference Figure 2 , the suspension rod 3 is connected to the weight 64, and a photoresistor 31 is fixed to the side of the weight 64 close to the bridge body. A power supply assembly 7 for supplying power to the electromagnet 1 44 is provided on the top surface of the weight 64; in this embodiment, two groups of power supply assemblies 7 are provided. The power supply assembly 7 includes a support plate 65 fixed to the top surface of the weight 64 and an electromagnet 2 32 fixed to the top surface of the support plate 65. The electromagnet 2 32, the photoresistor 31 and the power supply are connected in series to form a series circuit.

[0051] After the suspended weight 64 is lowered to be flush with the top surface of the bridge body, the photoresistor 31 on the side of the weight 64 close to the bridge body is shielded by the cross section of the bridge body and is shielded from light. The resistance of the photoresistor 31 increases as the light intensity weakens. The photoresistor 31 forms a series circuit with the electromagnet. When the resistance of the photoresistor 31 increases, the current of the series circuit decreases, thereby reducing the magnetism of the electromagnet.

[0052] Reference Figure 4 and Figure 5 , the top surface of the support plate 65 is connected with a switch movable piece 71 and a switch fixed piece 72 in a sliding manner along the width direction of the suspension rod 3; the side walls of the switch movable piece 71 and the switch fixed piece 72 are fixed with a guide piece 2 73, and the top surface of the support plate 65 is provided with a guide groove 2 74, and the guide piece 2 73 is connected to the support plate 65 in a sliding manner through the guide groove 2 74. A spring 2 75 is fixed to the side of the guide piece 2 73 close to the electromagnet 2 32, and the end of the spring 2 75 away from the guide piece 2 73 is fixedly connected to the inner wall of the guide groove 2 74. The relative outer sides of the switch movable piece 71 and the switch fixed piece 72 are respectively fixed with a magnetic attraction piece 2 33 that can be magnetically attracted to the electromagnet 2 32. The switch movable piece 71 is electrically connected to the electromagnet 1 44, and the switch fixed piece 72 is electrically connected to the power supply.

[0053] By adsorbing the magnetic attraction plate 2 33 through the electromagnet 2 32, the switch movable plate 71 and the switch fixed plate 72 can be driven to move in opposite directions respectively, so that the electromagnet 1 44 is disconnected from the power supply; through the two springs 2 75, the switch movable plate 71 and the switch fixed plate 72 can be driven to move in opposite directions respectively, so that the switch movable plate 71 and the switch fixed plate 72 are in electrical contact.

[0054] The implementation principle of a spliced ​​bridge in the embodiment of the present application is:

[0055] After the suspension mechanism 2 lowers the weight 64 to be flush with the bridge deck, the photoresistor 31 on the side of the weight 64 close to the bridge body is blocked by the cross section of the bridge body. The resistance of the photoresistor 31 itself increases as the light intensity weakens, and the current in the series circuit decreases, thereby reducing the magnetism of the electromagnet 2 32.

[0056] After the magnetism of electromagnet 2 32 is reduced, spring 2 75 can overcome the adsorption effect of electromagnet 2 32 on magnetic attraction plate 2 33, and the switch movable plate 71 and the switch fixed plate 72 move toward each other under the elastic force of spring 2 75, so that the switch movable plate 71 and the switch fixed plate 72 are in electrical contact, and electromagnet 1 44 is in a conducting state.

[0057] After the electromagnet 44 is energized, the electromagnet 44 adsorbs the magnetic sheet 45, so that the insert sheet 41 is separated from the rotating shaft 24, so that the rotating drum no longer rotates with the rotating shaft 24; the suspension mechanism 2 stops lowering the weight 64. The insert sheet 41 is attracted by the electromagnet and moves away from the rotating shaft 24. The insert sheet 41 abuts against the abutting sheet 52 and pushes the connecting plate 6 to move away from the cylinder 23. When the connecting plate 6 is engaged with the rotating plate 63, the cylinder 23 is limited and stops rotating.

[0058] A bridge splicing method comprises the following steps:

[0059] A bridge splicing method for a spliced ​​bridge comprises the following steps:

[0060] S1. A tower crane base 1 is set up at the bridge section, and a suspension mechanism 2 is arranged on the base.

[0061] S2. The suspension mechanism 2 suspends the weight 64 and moves it to a position flush with the top of the bridge section, then stops moving, and the bridge is spliced ​​and constructed.

[0062] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A spliced ​​bridge, comprising a tower crane base (1), a suspension mechanism (2) arranged on the tower crane base (1), and a suspension rod (3) arranged at the bottom end of the suspension mechanism (2), characterized in that: The suspension mechanism (2) comprises a drum (5) fixed on the tower crane base (1); the drum (5) comprises a drum frame (22) and a rotating shaft (24) rotatably connected to the drum frame (22); a cylinder (23) is rotatably arranged around the rotating shaft (24); a plug-in sheet (41) is slidably arranged in the cylinder (23) along its radial direction and can be plugged into the peripheral side of the rotating shaft (24); an electromagnet (44) is fixedly arranged in the cylinder (23), and a magnetic attraction sheet (45) that can be magnetically attracted to the electromagnet (44) is fixedly arranged on the side of the plug-in sheet (41) away from the rotating shaft (24); a weight (64) is fixedly connected to the bottom of the suspension rod (3), and a photoresistor (31) is fixedly arranged on the side of the weight (64) close to the bridge body; a power supply component (7) that can supply power to the electromagnet (44) is arranged between the photoresistor (31) and the electromagnet (44); A winding rope (25) is wound around the outer circumference of the cylinder (23); the bottom end of the winding rope (25) is fixedly connected to the suspension rod (3); rotating plates (63) are respectively fixed to the inner sides of the drum frame (22); a motor is fixed to the outer side of the rotating plate (63); the motor output shaft is coaxially fixedly connected to the end of the rotating shaft (24); a rotating hole (21) arranged along the axial direction of the cylinder (23) is opened at the axial center position of the cylinder (23); the rotating shaft (24) is rotatably connected to the reel (5) through the rotating hole (21); a sliding groove (43) is opened on the circumferential side of the rotating hole (21); the cylinder (23) is slidably connected to the insert (41) along its own radial direction through the sliding groove (43); the electromagnet (44) is fixed to the inner wall of the sliding groove (43) away from the rotating hole (21); A second slide groove (51) is provided on a side of the first slide groove (43) close to the rotating plate (63); the cylinder (23) is connected to a contact plate (52) by sliding along its own axial direction through the second slide groove (51); inclined surfaces (53) are provided on the inner sides of the contact plate (52) and the insert plate (41); a connecting plate (6) is fixed on a side of the contact plate (52) close to the rotating plate (63); and a rotating plate (63) capable of engaging with the connecting plate (6) is fixed on the side wall of the cylinder frame (22).

2. A spliced ​​bridge according to claim 1, characterized in that: The power supply assembly (7) comprises a support plate (65) fixed to the top surface of the weight (64) and an electromagnet 2 (32) fixed to the top surface of the support plate (65); the electromagnet 2 (32), the photoresistor (31) and the power supply are connected in series to form a series circuit; a switch movable plate (71) and a switch fixed plate (72) are slidably connected to the top surface of the support plate (65) along the width direction of the suspension rod (3); a magnetic attraction plate 2 (33) that can be magnetically attracted to the electromagnet 2 (32) is respectively fixed to the relative outer sides of the switch movable plate (71) and the switch fixed plate (72); the switch movable plate (71) is electrically connected to the electromagnet 1 (44), and the switch fixed plate (72) is electrically connected to the power supply.

3. A spliced ​​bridge according to claim 2, characterized in that: A second guide piece (73) is fixed to the side walls of the switch movable piece (71) and the switch fixed piece (72), a second guide groove (74) is provided on the top surface of the support plate (65), and the second guide piece (73) is slidably connected to the support plate (65) through the second guide groove (74).

4. A spliced ​​bridge according to claim 3, characterized in that: A second spring (75) is fixed to a side of the second guide piece (73) close to the second electromagnet (32), and an end of the second spring (75) away from the second guide piece (73) is fixedly connected to the inner wall of the second guide groove (74).

5. The spliced ​​bridge according to claim 1, characterized in that: A guide piece 1 (54) is fixed to the side of the abutment piece (52) away from the rotating shaft (24), and a guide groove 1 (55) is provided to the side of the slide groove 2 (51) away from the rotating hole (21). The guide piece 1 (54) is slidably connected to the cylinder (23) along the axial direction of the cylinder (23) via the guide groove 1 (55).

6. The spliced ​​bridge according to claim 5, characterized in that: A spring 1 (56) is fixed to a side of the guide piece 1 (54) close to the rotating plate (63), and an end of the spring 1 (56) away from the guide piece 1 (54) is fixedly connected to an inner wall of a side of the guide groove 1 (55) away from the sliding groove 1 (43).

7. The spliced ​​bridge according to claim 6, characterized in that: A plurality of engaging teeth (61) are fixed to a side of the connection plate (6) away from the cylinder (23); and a plurality of engaging grooves (62) which can be plugged into the engaging teeth (61) are formed on a side of the rotation plate (63) close to the cylinder (23).

8. A method for splicing a spliced ​​bridge according to any one of claims 1 to 7, characterized in that: The steps include: A tower crane base (1) is set up at the bridge section, and a suspension mechanism (2) is arranged on the base; The suspension mechanism (2) suspends the weight (64) and moves it to a position flush with the top of the bridge section, then stops moving, and the bridge is spliced ​​and constructed.

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